Played it, can't piece it all together but I noticed when I 'died' by jumping down that bottomless pit early on, the sound that played was a heart beat/Blood Rushing to Head sound, and clearly a car's blinker clicking

There's a place with a few car tires in with the rocks, as well as car parts of all sorts all over the place. I'm thinking the guy's brakes failed and his car flew off a cliff into the ocean but that's just me, whoever the guy is

I also recall the narrator mentioning something about the diagrams in the waiting room at a hospital representing the chemical reactions that were breaking Esther down, presumably as she was dying. This would explain the drawings of neurons that can be found along with the circuit diagrams, as Esther was losing her brain function.

I have burnt my belongings, my books, this death certificate. Mine will
be written all across this island. Who was Jacobson, who remembers him? Donnelly
has written of him, but who was Donnelly, who remembers him? I have painted,
carved, hewn, scored into this space all that I could draw from him. There will be
another to these shores to remember me. I will rise from the ocean like an island
without bottom, come together like a stone, become an aerial, a beacon that they will
not forget you. We have always been drawn here: one day the gulls will return and
nest in our bones and our history. I will look to my left and see Esther Donnelly, flying
beside me. I will look to my right and see Paul Jacobson, flying beside me. They will
leave white lines carved into the air to reach the mainland, where help will be sent..
My ascent is predetermined and forever begun.